During the period of the struggle between Ptolemy Al-atenasher and Cleopatra VII for the throne, the presence of Julius Caesar at the head of troops in Egypt .Achillas, who installed her as Queen of Egypt. Still, Arsinoe was on the side of her brother Ptolemy Attalid against her sister Cleopatra VII. I disagreed with Achilles on the course of the battle, and Ganymedes, who was moving arsenoi, killed Achilles and led the army that arsenoi was nominally leading in the Battle of Pelusium against the forces of Caesar and the commander Mithridates of Pergamon and allied Jewish and Nabataean forces. Caesar returned to Alexandria, and after he handed over Egypt to Cleopatra VII and her younger brother Ptolemy IV sat on the throne of Egypt as a co-king, he left Egypt and took arsenoi with him and displayed it in Rome in a triumphal parade. And soon after, she was exiled to Ephesus and lived in the temple of Artemis, because Caesar intended to leave her alive so that she could use it if an emergency happened, as she was the legitimate heir to the throne of Egypt.
In it, historians mention that she returned to Alexandria and Marcus Antonius ordered her to be killed at the request of Cleopatra (41 BC. However, archaeologists found her skeleton in 1929 in the Ephesus region of Turkey, and modern scientific studies on the skeleton have shown that her mother - and Cleopatra's mother - was of African descent.